./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/triangular-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/triangular-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b585114ab4aff9777d36c84f93f7abe0931f77338421f004296c8a8d328d3dfd --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:39:42,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:39:42,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:39:42,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:39:42,615 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:39:42,617 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:39:42,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:39:42,622 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:39:42,623 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:39:42,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:39:42,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:39:42,629 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:39:42,629 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:39:42,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:39:42,632 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:39:42,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:39:42,634 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:39:42,635 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:39:42,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:39:42,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:39:42,643 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:39:42,643 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:39:42,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:39:42,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:39:42,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:39:42,650 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:39:42,650 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:39:42,651 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:39:42,652 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:39:42,652 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:39:42,653 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:39:42,653 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:39:42,654 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:39:42,654 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:39:42,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:39:42,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:39:42,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:39:42,657 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:39:42,657 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:39:42,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:39:42,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:39:42,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:39:42,660 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:39:42,686 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:39:42,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:39:42,687 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:39:42,687 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:39:42,688 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:39:42,688 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:39:42,688 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:39:42,688 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:39:42,688 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:39:42,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:39:42,689 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:39:42,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:39:42,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:39:42,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:39:42,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:39:42,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:39:42,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:39:42,690 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:39:42,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:39:42,691 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:39:42,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:39:42,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:39:42,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:39:42,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:39:42,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:39:42,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:39:42,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:39:42,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:39:42,693 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:39:42,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:39:42,693 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:39:42,693 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:39:42,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:39:42,693 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b585114ab4aff9777d36c84f93f7abe0931f77338421f004296c8a8d328d3dfd [2022-07-13 21:39:42,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:39:42,865 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:39:42,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:39:42,867 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:39:42,868 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:39:42,869 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-1.i [2022-07-13 21:39:42,927 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c73cd2852/5ec44adcd32a44b3b18e3972be5140b6/FLAG0d6029323 [2022-07-13 21:39:43,335 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:39:43,342 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-1.i [2022-07-13 21:39:43,354 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c73cd2852/5ec44adcd32a44b3b18e3972be5140b6/FLAG0d6029323 [2022-07-13 21:39:43,362 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c73cd2852/5ec44adcd32a44b3b18e3972be5140b6 [2022-07-13 21:39:43,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:39:43,365 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:39:43,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:39:43,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:39:43,368 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:39:43,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:39:43" (1/1) ... [2022-07-13 21:39:43,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ad71ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:43, skipping insertion in model container [2022-07-13 21:39:43,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:39:43" (1/1) ... [2022-07-13 21:39:43,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:39:43,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:39:43,623 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-1.i[30950,30963] [2022-07-13 21:39:43,625 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:39:43,630 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:39:43,656 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-1.i[30950,30963] [2022-07-13 21:39:43,657 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:39:43,679 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:39:43,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:43 WrapperNode [2022-07-13 21:39:43,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:39:43,681 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:39:43,681 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:39:43,681 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:39:43,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:43" (1/1) ... [2022-07-13 21:39:43,709 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:43" (1/1) ... [2022-07-13 21:39:43,725 INFO L137 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2022-07-13 21:39:43,725 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:39:43,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:39:43,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:39:43,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:39:43,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:43" (1/1) ... [2022-07-13 21:39:43,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:43" (1/1) ... [2022-07-13 21:39:43,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:43" (1/1) ... [2022-07-13 21:39:43,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:43" (1/1) ... [2022-07-13 21:39:43,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:43" (1/1) ... [2022-07-13 21:39:43,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:43" (1/1) ... [2022-07-13 21:39:43,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:43" (1/1) ... [2022-07-13 21:39:43,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:39:43,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:39:43,765 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:39:43,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:39:43,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:43" (1/1) ... [2022-07-13 21:39:43,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:39:43,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:39:43,793 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 21:39:43,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 21:39:43,819 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-07-13 21:39:43,820 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-07-13 21:39:43,820 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-07-13 21:39:43,820 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-07-13 21:39:43,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:39:43,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 21:39:43,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:39:43,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:39:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:39:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:39:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 21:39:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:39:43,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:39:43,822 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 21:39:43,893 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:39:43,894 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:39:44,002 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:39:44,006 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:39:44,007 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 21:39:44,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:39:44 BoogieIcfgContainer [2022-07-13 21:39:44,008 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:39:44,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:39:44,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:39:44,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:39:44,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:39:43" (1/3) ... [2022-07-13 21:39:44,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c32732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:39:44, skipping insertion in model container [2022-07-13 21:39:44,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:43" (2/3) ... [2022-07-13 21:39:44,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c32732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:39:44, skipping insertion in model container [2022-07-13 21:39:44,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:39:44" (3/3) ... [2022-07-13 21:39:44,014 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2022-07-13 21:39:44,017 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:39:44,037 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:39:44,038 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 21:39:44,038 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:39:44,108 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:39:44,140 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 72 places, 70 transitions, 150 flow [2022-07-13 21:39:44,169 INFO L129 PetriNetUnfolder]: 5/68 cut-off events. [2022-07-13 21:39:44,170 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:39:44,173 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 68 events. 5/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2022-07-13 21:39:44,174 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 70 transitions, 150 flow [2022-07-13 21:39:44,177 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 68 transitions, 142 flow [2022-07-13 21:39:44,183 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:39:44,191 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@b566b1, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5229e7d7 [2022-07-13 21:39:44,192 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-13 21:39:44,202 INFO L129 PetriNetUnfolder]: 4/58 cut-off events. [2022-07-13 21:39:44,206 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:39:44,206 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:44,207 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:44,207 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:44,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:44,211 INFO L85 PathProgramCache]: Analyzing trace with hash 398220865, now seen corresponding path program 1 times [2022-07-13 21:39:44,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:44,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686751933] [2022-07-13 21:39:44,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:44,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:44,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:44,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:44,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:44,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686751933] [2022-07-13 21:39:44,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686751933] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:44,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:44,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:39:44,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061540939] [2022-07-13 21:39:44,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:44,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:39:44,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:44,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:39:44,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:39:44,585 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:44,593 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:44,594 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:44,594 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:44,595 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:44,771 INFO L129 PetriNetUnfolder]: 42/203 cut-off events. [2022-07-13 21:39:44,771 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-13 21:39:44,773 INFO L84 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 203 events. 42/203 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 761 event pairs, 3 based on Foata normal form. 45/231 useless extension candidates. Maximal degree in co-relation 250. Up to 28 conditions per place. [2022-07-13 21:39:44,776 INFO L132 encePairwiseOnDemand]: 59/70 looper letters, 22 selfloop transitions, 17 changer transitions 0/92 dead transitions. [2022-07-13 21:39:44,776 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 271 flow [2022-07-13 21:39:44,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 21:39:44,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-13 21:39:44,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 613 transitions. [2022-07-13 21:39:44,787 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8757142857142857 [2022-07-13 21:39:44,788 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 613 transitions. [2022-07-13 21:39:44,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 613 transitions. [2022-07-13 21:39:44,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:44,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 613 transitions. [2022-07-13 21:39:44,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 61.3) internal successors, (613), 10 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:44,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:44,799 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:44,801 INFO L186 Difference]: Start difference. First operand has 70 places, 68 transitions, 142 flow. Second operand 10 states and 613 transitions. [2022-07-13 21:39:44,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 271 flow [2022-07-13 21:39:44,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 92 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-13 21:39:44,805 INFO L242 Difference]: Finished difference. Result has 85 places, 85 transitions, 276 flow [2022-07-13 21:39:44,807 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=276, PETRI_PLACES=85, PETRI_TRANSITIONS=85} [2022-07-13 21:39:44,809 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 15 predicate places. [2022-07-13 21:39:44,809 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 276 flow [2022-07-13 21:39:44,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:44,810 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:44,810 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:44,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:39:44,810 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:44,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:44,811 INFO L85 PathProgramCache]: Analyzing trace with hash 245149124, now seen corresponding path program 1 times [2022-07-13 21:39:44,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:44,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853765633] [2022-07-13 21:39:44,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:44,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:44,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:44,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853765633] [2022-07-13 21:39:44,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853765633] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:44,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:44,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:39:44,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12438437] [2022-07-13 21:39:44,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:44,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:39:44,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:44,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:39:44,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:39:44,893 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:44,893 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 85 transitions, 276 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:44,893 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:44,893 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:44,893 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:44,961 INFO L129 PetriNetUnfolder]: 46/218 cut-off events. [2022-07-13 21:39:44,962 INFO L130 PetriNetUnfolder]: For 115/120 co-relation queries the response was YES. [2022-07-13 21:39:44,963 INFO L84 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 218 events. 46/218 cut-off events. For 115/120 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 854 event pairs, 0 based on Foata normal form. 3/206 useless extension candidates. Maximal degree in co-relation 377. Up to 35 conditions per place. [2022-07-13 21:39:44,964 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 16 selfloop transitions, 9 changer transitions 40/110 dead transitions. [2022-07-13 21:39:44,964 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 110 transitions, 508 flow [2022-07-13 21:39:44,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 21:39:44,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 21:39:44,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 475 transitions. [2022-07-13 21:39:44,965 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8482142857142857 [2022-07-13 21:39:44,966 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 475 transitions. [2022-07-13 21:39:44,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 475 transitions. [2022-07-13 21:39:44,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:44,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 475 transitions. [2022-07-13 21:39:44,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 59.375) internal successors, (475), 8 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:44,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:44,969 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:44,969 INFO L186 Difference]: Start difference. First operand has 85 places, 85 transitions, 276 flow. Second operand 8 states and 475 transitions. [2022-07-13 21:39:44,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 110 transitions, 508 flow [2022-07-13 21:39:44,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 110 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:39:44,973 INFO L242 Difference]: Finished difference. Result has 96 places, 67 transitions, 237 flow [2022-07-13 21:39:44,973 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=237, PETRI_PLACES=96, PETRI_TRANSITIONS=67} [2022-07-13 21:39:44,974 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 26 predicate places. [2022-07-13 21:39:44,974 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 67 transitions, 237 flow [2022-07-13 21:39:44,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:44,974 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:44,974 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:44,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:39:44,975 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:44,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:44,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1444168350, now seen corresponding path program 1 times [2022-07-13 21:39:44,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:44,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910246635] [2022-07-13 21:39:44,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:44,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:45,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:45,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:45,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910246635] [2022-07-13 21:39:45,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910246635] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:45,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:45,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:39:45,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127678375] [2022-07-13 21:39:45,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:45,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:39:45,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:45,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:39:45,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:39:45,043 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:45,043 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 67 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:45,043 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:45,043 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:45,044 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:45,124 INFO L129 PetriNetUnfolder]: 37/196 cut-off events. [2022-07-13 21:39:45,124 INFO L130 PetriNetUnfolder]: For 265/276 co-relation queries the response was YES. [2022-07-13 21:39:45,125 INFO L84 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 196 events. 37/196 cut-off events. For 265/276 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 654 event pairs, 0 based on Foata normal form. 12/190 useless extension candidates. Maximal degree in co-relation 362. Up to 35 conditions per place. [2022-07-13 21:39:45,126 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 23 selfloop transitions, 11 changer transitions 8/87 dead transitions. [2022-07-13 21:39:45,126 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 87 transitions, 457 flow [2022-07-13 21:39:45,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:39:45,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:39:45,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 530 transitions. [2022-07-13 21:39:45,128 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8412698412698413 [2022-07-13 21:39:45,128 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 530 transitions. [2022-07-13 21:39:45,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 530 transitions. [2022-07-13 21:39:45,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:45,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 530 transitions. [2022-07-13 21:39:45,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.888888888888886) internal successors, (530), 9 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:45,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:45,132 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:45,132 INFO L186 Difference]: Start difference. First operand has 96 places, 67 transitions, 237 flow. Second operand 9 states and 530 transitions. [2022-07-13 21:39:45,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 87 transitions, 457 flow [2022-07-13 21:39:45,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 87 transitions, 387 flow, removed 25 selfloop flow, removed 9 redundant places. [2022-07-13 21:39:45,138 INFO L242 Difference]: Finished difference. Result has 86 places, 72 transitions, 289 flow [2022-07-13 21:39:45,138 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=289, PETRI_PLACES=86, PETRI_TRANSITIONS=72} [2022-07-13 21:39:45,138 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2022-07-13 21:39:45,138 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 72 transitions, 289 flow [2022-07-13 21:39:45,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:45,139 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:45,139 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:45,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:39:45,139 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:45,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:45,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1245653052, now seen corresponding path program 2 times [2022-07-13 21:39:45,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:45,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93036467] [2022-07-13 21:39:45,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:45,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:45,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:45,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:45,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93036467] [2022-07-13 21:39:45,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93036467] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:45,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:45,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:39:45,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100349740] [2022-07-13 21:39:45,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:45,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:39:45,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:45,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:39:45,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:39:45,263 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:45,264 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 72 transitions, 289 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:45,264 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:45,264 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:45,264 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:45,349 INFO L129 PetriNetUnfolder]: 30/185 cut-off events. [2022-07-13 21:39:45,349 INFO L130 PetriNetUnfolder]: For 253/276 co-relation queries the response was YES. [2022-07-13 21:39:45,350 INFO L84 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 185 events. 30/185 cut-off events. For 253/276 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 619 event pairs, 0 based on Foata normal form. 18/186 useless extension candidates. Maximal degree in co-relation 373. Up to 32 conditions per place. [2022-07-13 21:39:45,351 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 19 selfloop transitions, 12 changer transitions 11/87 dead transitions. [2022-07-13 21:39:45,351 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 87 transitions, 487 flow [2022-07-13 21:39:45,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:39:45,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:39:45,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 524 transitions. [2022-07-13 21:39:45,353 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8317460317460318 [2022-07-13 21:39:45,353 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 524 transitions. [2022-07-13 21:39:45,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 524 transitions. [2022-07-13 21:39:45,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:45,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 524 transitions. [2022-07-13 21:39:45,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:45,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:45,356 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:45,356 INFO L186 Difference]: Start difference. First operand has 86 places, 72 transitions, 289 flow. Second operand 9 states and 524 transitions. [2022-07-13 21:39:45,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 87 transitions, 487 flow [2022-07-13 21:39:45,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 87 transitions, 467 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-07-13 21:39:45,359 INFO L242 Difference]: Finished difference. Result has 93 places, 73 transitions, 332 flow [2022-07-13 21:39:45,359 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=332, PETRI_PLACES=93, PETRI_TRANSITIONS=73} [2022-07-13 21:39:45,360 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 23 predicate places. [2022-07-13 21:39:45,360 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 332 flow [2022-07-13 21:39:45,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:45,360 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:45,360 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:45,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:39:45,361 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:45,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:45,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1461818299, now seen corresponding path program 1 times [2022-07-13 21:39:45,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:45,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669269483] [2022-07-13 21:39:45,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:45,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:45,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:45,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669269483] [2022-07-13 21:39:45,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669269483] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:45,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:45,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:39:45,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906692312] [2022-07-13 21:39:45,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:45,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:39:45,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:45,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:39:45,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:39:45,447 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:45,447 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 73 transitions, 332 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:45,448 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:45,448 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:45,448 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:45,537 INFO L129 PetriNetUnfolder]: 43/234 cut-off events. [2022-07-13 21:39:45,537 INFO L130 PetriNetUnfolder]: For 621/645 co-relation queries the response was YES. [2022-07-13 21:39:45,538 INFO L84 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 234 events. 43/234 cut-off events. For 621/645 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 845 event pairs, 1 based on Foata normal form. 17/229 useless extension candidates. Maximal degree in co-relation 535. Up to 50 conditions per place. [2022-07-13 21:39:45,539 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 23 selfloop transitions, 21 changer transitions 8/97 dead transitions. [2022-07-13 21:39:45,540 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 97 transitions, 660 flow [2022-07-13 21:39:45,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 21:39:45,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-13 21:39:45,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 644 transitions. [2022-07-13 21:39:45,541 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8363636363636363 [2022-07-13 21:39:45,542 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 644 transitions. [2022-07-13 21:39:45,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 644 transitions. [2022-07-13 21:39:45,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:45,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 644 transitions. [2022-07-13 21:39:45,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.54545454545455) internal successors, (644), 11 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:45,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:45,545 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:45,545 INFO L186 Difference]: Start difference. First operand has 93 places, 73 transitions, 332 flow. Second operand 11 states and 644 transitions. [2022-07-13 21:39:45,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 97 transitions, 660 flow [2022-07-13 21:39:45,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 97 transitions, 544 flow, removed 45 selfloop flow, removed 10 redundant places. [2022-07-13 21:39:45,548 INFO L242 Difference]: Finished difference. Result has 97 places, 79 transitions, 417 flow [2022-07-13 21:39:45,549 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=417, PETRI_PLACES=97, PETRI_TRANSITIONS=79} [2022-07-13 21:39:45,549 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 27 predicate places. [2022-07-13 21:39:45,549 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 79 transitions, 417 flow [2022-07-13 21:39:45,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:45,550 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:45,550 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:45,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:39:45,550 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:45,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:45,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1283973881, now seen corresponding path program 2 times [2022-07-13 21:39:45,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:45,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378088296] [2022-07-13 21:39:45,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:45,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:45,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:45,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378088296] [2022-07-13 21:39:45,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378088296] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:45,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:45,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:39:45,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635048810] [2022-07-13 21:39:45,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:45,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:39:45,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:45,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:39:45,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:39:45,645 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:45,645 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 79 transitions, 417 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:45,645 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:45,645 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:45,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:45,747 INFO L129 PetriNetUnfolder]: 36/209 cut-off events. [2022-07-13 21:39:45,747 INFO L130 PetriNetUnfolder]: For 773/809 co-relation queries the response was YES. [2022-07-13 21:39:45,748 INFO L84 FinitePrefix]: Finished finitePrefix Result has 595 conditions, 209 events. 36/209 cut-off events. For 773/809 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 715 event pairs, 1 based on Foata normal form. 27/217 useless extension candidates. Maximal degree in co-relation 551. Up to 44 conditions per place. [2022-07-13 21:39:45,749 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 20 selfloop transitions, 21 changer transitions 11/97 dead transitions. [2022-07-13 21:39:45,749 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 97 transitions, 749 flow [2022-07-13 21:39:45,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 21:39:45,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-13 21:39:45,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 638 transitions. [2022-07-13 21:39:45,751 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-07-13 21:39:45,751 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 638 transitions. [2022-07-13 21:39:45,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 638 transitions. [2022-07-13 21:39:45,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:45,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 638 transitions. [2022-07-13 21:39:45,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:45,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:45,754 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:45,754 INFO L186 Difference]: Start difference. First operand has 97 places, 79 transitions, 417 flow. Second operand 11 states and 638 transitions. [2022-07-13 21:39:45,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 97 transitions, 749 flow [2022-07-13 21:39:45,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 97 transitions, 693 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-07-13 21:39:45,758 INFO L242 Difference]: Finished difference. Result has 104 places, 80 transitions, 470 flow [2022-07-13 21:39:45,758 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=470, PETRI_PLACES=104, PETRI_TRANSITIONS=80} [2022-07-13 21:39:45,759 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 34 predicate places. [2022-07-13 21:39:45,759 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 80 transitions, 470 flow [2022-07-13 21:39:45,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:45,760 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:45,760 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:45,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:39:45,760 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:45,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:45,761 INFO L85 PathProgramCache]: Analyzing trace with hash -949175033, now seen corresponding path program 3 times [2022-07-13 21:39:45,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:45,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289436250] [2022-07-13 21:39:45,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:45,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:45,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:45,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:45,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289436250] [2022-07-13 21:39:45,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289436250] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:45,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:45,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:39:45,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356095116] [2022-07-13 21:39:45,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:45,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:39:45,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:45,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:39:45,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:39:45,813 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:45,814 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 80 transitions, 470 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:45,814 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:45,814 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:45,814 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:45,888 INFO L129 PetriNetUnfolder]: 37/218 cut-off events. [2022-07-13 21:39:45,889 INFO L130 PetriNetUnfolder]: For 962/999 co-relation queries the response was YES. [2022-07-13 21:39:45,889 INFO L84 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 218 events. 37/218 cut-off events. For 962/999 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 855 event pairs, 0 based on Foata normal form. 31/229 useless extension candidates. Maximal degree in co-relation 598. Up to 45 conditions per place. [2022-07-13 21:39:45,890 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 28 selfloop transitions, 16 changer transitions 5/94 dead transitions. [2022-07-13 21:39:45,890 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 94 transitions, 753 flow [2022-07-13 21:39:45,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:39:45,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:39:45,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 526 transitions. [2022-07-13 21:39:45,892 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.834920634920635 [2022-07-13 21:39:45,892 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 526 transitions. [2022-07-13 21:39:45,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 526 transitions. [2022-07-13 21:39:45,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:45,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 526 transitions. [2022-07-13 21:39:45,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.44444444444444) internal successors, (526), 9 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:45,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:45,895 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:45,895 INFO L186 Difference]: Start difference. First operand has 104 places, 80 transitions, 470 flow. Second operand 9 states and 526 transitions. [2022-07-13 21:39:45,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 94 transitions, 753 flow [2022-07-13 21:39:45,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 94 transitions, 677 flow, removed 19 selfloop flow, removed 9 redundant places. [2022-07-13 21:39:45,899 INFO L242 Difference]: Finished difference. Result has 104 places, 85 transitions, 532 flow [2022-07-13 21:39:45,899 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=532, PETRI_PLACES=104, PETRI_TRANSITIONS=85} [2022-07-13 21:39:45,900 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 34 predicate places. [2022-07-13 21:39:45,900 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 85 transitions, 532 flow [2022-07-13 21:39:45,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:45,900 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:45,900 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:45,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 21:39:45,901 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:45,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:45,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1915188887, now seen corresponding path program 1 times [2022-07-13 21:39:45,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:45,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585849153] [2022-07-13 21:39:45,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:45,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:45,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:45,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:45,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585849153] [2022-07-13 21:39:45,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585849153] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:39:45,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012325253] [2022-07-13 21:39:45,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:45,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:45,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:39:45,958 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:39:45,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 21:39:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:46,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 21:39:46,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:39:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:46,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:39:46,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:46,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012325253] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:39:46,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:39:46,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-07-13 21:39:46,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275106348] [2022-07-13 21:39:46,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:39:46,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 21:39:46,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:46,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 21:39:46,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-07-13 21:39:46,273 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:46,274 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 85 transitions, 532 flow. Second operand has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:46,274 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:46,274 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:46,274 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:46,530 INFO L129 PetriNetUnfolder]: 55/317 cut-off events. [2022-07-13 21:39:46,530 INFO L130 PetriNetUnfolder]: For 1278/1326 co-relation queries the response was YES. [2022-07-13 21:39:46,532 INFO L84 FinitePrefix]: Finished finitePrefix Result has 932 conditions, 317 events. 55/317 cut-off events. For 1278/1326 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1281 event pairs, 1 based on Foata normal form. 36/322 useless extension candidates. Maximal degree in co-relation 885. Up to 67 conditions per place. [2022-07-13 21:39:46,534 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 27 selfloop transitions, 38 changer transitions 14/124 dead transitions. [2022-07-13 21:39:46,534 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 124 transitions, 1220 flow [2022-07-13 21:39:46,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-13 21:39:46,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-07-13 21:39:46,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1159 transitions. [2022-07-13 21:39:46,537 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8278571428571428 [2022-07-13 21:39:46,538 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1159 transitions. [2022-07-13 21:39:46,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1159 transitions. [2022-07-13 21:39:46,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:46,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1159 transitions. [2022-07-13 21:39:46,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 57.95) internal successors, (1159), 20 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:46,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:46,543 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:46,543 INFO L186 Difference]: Start difference. First operand has 104 places, 85 transitions, 532 flow. Second operand 20 states and 1159 transitions. [2022-07-13 21:39:46,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 124 transitions, 1220 flow [2022-07-13 21:39:46,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 124 transitions, 1199 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-07-13 21:39:46,549 INFO L242 Difference]: Finished difference. Result has 128 places, 101 transitions, 879 flow [2022-07-13 21:39:46,549 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=879, PETRI_PLACES=128, PETRI_TRANSITIONS=101} [2022-07-13 21:39:46,551 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 58 predicate places. [2022-07-13 21:39:46,551 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 101 transitions, 879 flow [2022-07-13 21:39:46,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:46,552 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:46,552 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:46,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 21:39:46,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:46,767 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:46,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:46,767 INFO L85 PathProgramCache]: Analyzing trace with hash -2022110288, now seen corresponding path program 1 times [2022-07-13 21:39:46,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:46,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488945405] [2022-07-13 21:39:46,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:46,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:39:46,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:46,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488945405] [2022-07-13 21:39:46,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488945405] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:39:46,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063727935] [2022-07-13 21:39:46,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:46,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:46,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:39:46,895 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:39:46,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 21:39:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:46,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 21:39:46,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:39:47,047 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:39:47,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:39:47,238 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:39:47,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063727935] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:39:47,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:39:47,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-07-13 21:39:47,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914307021] [2022-07-13 21:39:47,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:39:47,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 21:39:47,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:47,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 21:39:47,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-07-13 21:39:47,241 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:47,242 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 101 transitions, 879 flow. Second operand has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:47,242 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:47,242 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:47,242 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:47,548 INFO L129 PetriNetUnfolder]: 77/442 cut-off events. [2022-07-13 21:39:47,549 INFO L130 PetriNetUnfolder]: For 3503/3581 co-relation queries the response was YES. [2022-07-13 21:39:47,551 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1595 conditions, 442 events. 77/442 cut-off events. For 3503/3581 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1821 event pairs, 0 based on Foata normal form. 37/435 useless extension candidates. Maximal degree in co-relation 1532. Up to 103 conditions per place. [2022-07-13 21:39:47,553 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 58 selfloop transitions, 27 changer transitions 26/156 dead transitions. [2022-07-13 21:39:47,553 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 156 transitions, 2115 flow [2022-07-13 21:39:47,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-13 21:39:47,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-13 21:39:47,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1450 transitions. [2022-07-13 21:39:47,557 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-07-13 21:39:47,557 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1450 transitions. [2022-07-13 21:39:47,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1450 transitions. [2022-07-13 21:39:47,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:47,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1450 transitions. [2022-07-13 21:39:47,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 58.0) internal successors, (1450), 25 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:47,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:47,564 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:47,564 INFO L186 Difference]: Start difference. First operand has 128 places, 101 transitions, 879 flow. Second operand 25 states and 1450 transitions. [2022-07-13 21:39:47,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 156 transitions, 2115 flow [2022-07-13 21:39:47,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 156 transitions, 1698 flow, removed 191 selfloop flow, removed 12 redundant places. [2022-07-13 21:39:47,576 INFO L242 Difference]: Finished difference. Result has 154 places, 115 transitions, 1007 flow [2022-07-13 21:39:47,576 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1007, PETRI_PLACES=154, PETRI_TRANSITIONS=115} [2022-07-13 21:39:47,577 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 84 predicate places. [2022-07-13 21:39:47,577 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 115 transitions, 1007 flow [2022-07-13 21:39:47,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:47,578 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:47,578 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:47,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 21:39:47,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-13 21:39:47,792 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:47,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:47,793 INFO L85 PathProgramCache]: Analyzing trace with hash -2046027908, now seen corresponding path program 2 times [2022-07-13 21:39:47,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:47,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738588744] [2022-07-13 21:39:47,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:47,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:47,890 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:39:47,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:47,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738588744] [2022-07-13 21:39:47,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738588744] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:39:47,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778023101] [2022-07-13 21:39:47,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 21:39:47,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:47,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:39:47,892 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:39:47,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 21:39:47,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 21:39:47,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:39:47,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 21:39:47,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:39:48,017 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:39:48,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:39:48,167 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:39:48,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778023101] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:39:48,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:39:48,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-07-13 21:39:48,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138952013] [2022-07-13 21:39:48,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:39:48,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 21:39:48,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:48,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 21:39:48,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-07-13 21:39:48,169 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:48,170 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 115 transitions, 1007 flow. Second operand has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:48,170 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:48,170 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:48,170 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:48,630 INFO L129 PetriNetUnfolder]: 131/805 cut-off events. [2022-07-13 21:39:48,630 INFO L130 PetriNetUnfolder]: For 14458/14617 co-relation queries the response was YES. [2022-07-13 21:39:48,634 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3422 conditions, 805 events. 131/805 cut-off events. For 14458/14617 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4796 event pairs, 0 based on Foata normal form. 48/771 useless extension candidates. Maximal degree in co-relation 3342. Up to 163 conditions per place. [2022-07-13 21:39:48,638 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 58 selfloop transitions, 83 changer transitions 26/212 dead transitions. [2022-07-13 21:39:48,638 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 212 transitions, 3549 flow [2022-07-13 21:39:48,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-13 21:39:48,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-13 21:39:48,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1915 transitions. [2022-07-13 21:39:48,641 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.829004329004329 [2022-07-13 21:39:48,641 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1915 transitions. [2022-07-13 21:39:48,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1915 transitions. [2022-07-13 21:39:48,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:48,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1915 transitions. [2022-07-13 21:39:48,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 58.03030303030303) internal successors, (1915), 33 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:48,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:48,651 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:48,652 INFO L186 Difference]: Start difference. First operand has 154 places, 115 transitions, 1007 flow. Second operand 33 states and 1915 transitions. [2022-07-13 21:39:48,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 212 transitions, 3549 flow [2022-07-13 21:39:48,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 212 transitions, 2974 flow, removed 280 selfloop flow, removed 12 redundant places. [2022-07-13 21:39:48,675 INFO L242 Difference]: Finished difference. Result has 188 places, 158 transitions, 1866 flow [2022-07-13 21:39:48,676 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1866, PETRI_PLACES=188, PETRI_TRANSITIONS=158} [2022-07-13 21:39:48,676 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 118 predicate places. [2022-07-13 21:39:48,676 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 158 transitions, 1866 flow [2022-07-13 21:39:48,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:48,677 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:48,677 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:48,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 21:39:48,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:48,883 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:48,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:48,884 INFO L85 PathProgramCache]: Analyzing trace with hash -518674714, now seen corresponding path program 3 times [2022-07-13 21:39:48,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:48,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175660572] [2022-07-13 21:39:48,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:48,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:48,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:39:48,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:48,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175660572] [2022-07-13 21:39:48,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175660572] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:39:48,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507302348] [2022-07-13 21:39:48,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 21:39:48,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:48,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:39:48,945 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:39:48,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 21:39:48,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 21:39:48,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:39:48,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 21:39:49,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:39:49,078 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:39:49,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:39:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:39:49,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507302348] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:39:49,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:39:49,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-07-13 21:39:49,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828419055] [2022-07-13 21:39:49,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:39:49,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 21:39:49,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:49,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 21:39:49,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-07-13 21:39:49,194 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:49,194 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 158 transitions, 1866 flow. Second operand has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:49,195 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:49,195 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:49,195 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:49,765 INFO L129 PetriNetUnfolder]: 169/1075 cut-off events. [2022-07-13 21:39:49,765 INFO L130 PetriNetUnfolder]: For 36727/36963 co-relation queries the response was YES. [2022-07-13 21:39:49,771 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5443 conditions, 1075 events. 169/1075 cut-off events. For 36727/36963 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 7400 event pairs, 0 based on Foata normal form. 52/1017 useless extension candidates. Maximal degree in co-relation 5347. Up to 215 conditions per place. [2022-07-13 21:39:49,777 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 62 selfloop transitions, 130 changer transitions 31/268 dead transitions. [2022-07-13 21:39:49,777 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 268 transitions, 5607 flow [2022-07-13 21:39:49,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-13 21:39:49,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-13 21:39:49,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2085 transitions. [2022-07-13 21:39:49,779 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8273809523809523 [2022-07-13 21:39:49,780 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2085 transitions. [2022-07-13 21:39:49,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2085 transitions. [2022-07-13 21:39:49,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:49,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2085 transitions. [2022-07-13 21:39:49,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 57.916666666666664) internal successors, (2085), 36 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:49,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 70.0) internal successors, (2590), 37 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:49,786 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 70.0) internal successors, (2590), 37 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:49,786 INFO L186 Difference]: Start difference. First operand has 188 places, 158 transitions, 1866 flow. Second operand 36 states and 2085 transitions. [2022-07-13 21:39:49,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 268 transitions, 5607 flow [2022-07-13 21:39:49,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 268 transitions, 4763 flow, removed 403 selfloop flow, removed 18 redundant places. [2022-07-13 21:39:49,829 INFO L242 Difference]: Finished difference. Result has 218 places, 205 transitions, 2891 flow [2022-07-13 21:39:49,829 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2891, PETRI_PLACES=218, PETRI_TRANSITIONS=205} [2022-07-13 21:39:49,829 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 148 predicate places. [2022-07-13 21:39:49,830 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 205 transitions, 2891 flow [2022-07-13 21:39:49,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:49,830 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:49,830 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:49,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 21:39:50,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:50,047 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:50,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:50,047 INFO L85 PathProgramCache]: Analyzing trace with hash -390037378, now seen corresponding path program 4 times [2022-07-13 21:39:50,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:50,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294623149] [2022-07-13 21:39:50,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:50,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:50,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:50,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:50,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294623149] [2022-07-13 21:39:50,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294623149] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:39:50,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182424336] [2022-07-13 21:39:50,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 21:39:50,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:50,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:39:50,172 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:39:50,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 21:39:50,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 21:39:50,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:39:50,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 21:39:50,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:39:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:50,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:39:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:50,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182424336] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:39:50,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:39:50,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 20 [2022-07-13 21:39:50,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476442114] [2022-07-13 21:39:50,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:39:50,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 21:39:50,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:50,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 21:39:50,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-07-13 21:39:50,526 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:50,527 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 205 transitions, 2891 flow. Second operand has 20 states, 20 states have (on average 56.55) internal successors, (1131), 20 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:50,527 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:50,527 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:50,527 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:50,918 INFO L129 PetriNetUnfolder]: 194/1272 cut-off events. [2022-07-13 21:39:50,918 INFO L130 PetriNetUnfolder]: For 59877/60016 co-relation queries the response was YES. [2022-07-13 21:39:50,926 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7069 conditions, 1272 events. 194/1272 cut-off events. For 59877/60016 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 9360 event pairs, 1 based on Foata normal form. 37/1176 useless extension candidates. Maximal degree in co-relation 6962. Up to 247 conditions per place. [2022-07-13 21:39:50,934 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 96 selfloop transitions, 125 changer transitions 14/280 dead transitions. [2022-07-13 21:39:50,934 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 280 transitions, 6252 flow [2022-07-13 21:39:50,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-13 21:39:50,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-13 21:39:50,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1443 transitions. [2022-07-13 21:39:50,936 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8245714285714286 [2022-07-13 21:39:50,936 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1443 transitions. [2022-07-13 21:39:50,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1443 transitions. [2022-07-13 21:39:50,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:50,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1443 transitions. [2022-07-13 21:39:50,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 57.72) internal successors, (1443), 25 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:50,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:50,941 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:50,941 INFO L186 Difference]: Start difference. First operand has 218 places, 205 transitions, 2891 flow. Second operand 25 states and 1443 transitions. [2022-07-13 21:39:50,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 280 transitions, 6252 flow [2022-07-13 21:39:51,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 280 transitions, 5148 flow, removed 518 selfloop flow, removed 21 redundant places. [2022-07-13 21:39:51,053 INFO L242 Difference]: Finished difference. Result has 227 places, 248 transitions, 3726 flow [2022-07-13 21:39:51,053 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=2391, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3726, PETRI_PLACES=227, PETRI_TRANSITIONS=248} [2022-07-13 21:39:51,053 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 157 predicate places. [2022-07-13 21:39:51,053 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 248 transitions, 3726 flow [2022-07-13 21:39:51,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 56.55) internal successors, (1131), 20 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:51,054 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:51,054 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:51,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 21:39:51,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-13 21:39:51,268 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:51,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:51,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1871808408, now seen corresponding path program 5 times [2022-07-13 21:39:51,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:51,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559150998] [2022-07-13 21:39:51,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:51,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:51,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:51,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559150998] [2022-07-13 21:39:51,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559150998] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:39:51,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939538245] [2022-07-13 21:39:51,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 21:39:51,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:51,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:39:51,361 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:39:51,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 21:39:51,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-13 21:39:51,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:39:51,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 21:39:51,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:39:51,499 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:51,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:39:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:51,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939538245] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:39:51,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:39:51,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2022-07-13 21:39:51,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241152646] [2022-07-13 21:39:51,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:39:51,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 21:39:51,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:51,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 21:39:51,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2022-07-13 21:39:51,698 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:51,699 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 248 transitions, 3726 flow. Second operand has 26 states, 26 states have (on average 56.30769230769231) internal successors, (1464), 26 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:51,699 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:51,699 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:51,699 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:52,291 INFO L129 PetriNetUnfolder]: 251/1616 cut-off events. [2022-07-13 21:39:52,291 INFO L130 PetriNetUnfolder]: For 80214/80411 co-relation queries the response was YES. [2022-07-13 21:39:52,337 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9207 conditions, 1616 events. 251/1616 cut-off events. For 80214/80411 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 12647 event pairs, 1 based on Foata normal form. 64/1514 useless extension candidates. Maximal degree in co-relation 9094. Up to 331 conditions per place. [2022-07-13 21:39:52,348 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 71 selfloop transitions, 209 changer transitions 17/342 dead transitions. [2022-07-13 21:39:52,349 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 342 transitions, 7792 flow [2022-07-13 21:39:52,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 21:39:52,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-13 21:39:52,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1735 transitions. [2022-07-13 21:39:52,351 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8261904761904761 [2022-07-13 21:39:52,351 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1735 transitions. [2022-07-13 21:39:52,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1735 transitions. [2022-07-13 21:39:52,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:52,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1735 transitions. [2022-07-13 21:39:52,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 57.833333333333336) internal successors, (1735), 30 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:52,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 70.0) internal successors, (2170), 31 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:52,356 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 70.0) internal successors, (2170), 31 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:52,357 INFO L186 Difference]: Start difference. First operand has 227 places, 248 transitions, 3726 flow. Second operand 30 states and 1735 transitions. [2022-07-13 21:39:52,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 342 transitions, 7792 flow [2022-07-13 21:39:52,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 342 transitions, 6640 flow, removed 550 selfloop flow, removed 12 redundant places. [2022-07-13 21:39:52,478 INFO L242 Difference]: Finished difference. Result has 252 places, 309 transitions, 5304 flow [2022-07-13 21:39:52,479 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3324, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=5304, PETRI_PLACES=252, PETRI_TRANSITIONS=309} [2022-07-13 21:39:52,480 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 182 predicate places. [2022-07-13 21:39:52,480 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 309 transitions, 5304 flow [2022-07-13 21:39:52,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 56.30769230769231) internal successors, (1464), 26 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:52,480 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:52,480 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:52,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-13 21:39:52,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:52,697 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:52,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:52,697 INFO L85 PathProgramCache]: Analyzing trace with hash 959354339, now seen corresponding path program 6 times [2022-07-13 21:39:52,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:52,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511767197] [2022-07-13 21:39:52,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:52,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:52,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 75 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 21:39:52,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:52,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511767197] [2022-07-13 21:39:52,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511767197] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:39:52,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632226159] [2022-07-13 21:39:52,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 21:39:52,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:52,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:39:52,778 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:39:52,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 21:39:52,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-13 21:39:52,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:39:52,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 21:39:52,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:39:52,913 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 21:39:52,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:39:52,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632226159] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:52,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:39:52,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2022-07-13 21:39:52,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777114746] [2022-07-13 21:39:52,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:52,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 21:39:52,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:52,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 21:39:52,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-07-13 21:39:52,916 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 70 [2022-07-13 21:39:52,917 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 309 transitions, 5304 flow. Second operand has 13 states, 13 states have (on average 59.84615384615385) internal successors, (778), 13 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:52,917 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:52,917 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 70 [2022-07-13 21:39:52,917 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:53,649 INFO L129 PetriNetUnfolder]: 563/3477 cut-off events. [2022-07-13 21:39:53,650 INFO L130 PetriNetUnfolder]: For 80515/80603 co-relation queries the response was YES. [2022-07-13 21:39:53,680 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14947 conditions, 3477 events. 563/3477 cut-off events. For 80515/80603 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 35651 event pairs, 90 based on Foata normal form. 31/3167 useless extension candidates. Maximal degree in co-relation 14860. Up to 561 conditions per place. [2022-07-13 21:39:53,686 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 24 selfloop transitions, 20 changer transitions 179/325 dead transitions. [2022-07-13 21:39:53,686 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 325 transitions, 4943 flow [2022-07-13 21:39:53,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 21:39:53,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-13 21:39:53,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1090 transitions. [2022-07-13 21:39:53,689 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8650793650793651 [2022-07-13 21:39:53,689 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1090 transitions. [2022-07-13 21:39:53,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1090 transitions. [2022-07-13 21:39:53,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:53,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1090 transitions. [2022-07-13 21:39:53,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 60.55555555555556) internal successors, (1090), 18 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:53,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 70.0) internal successors, (1330), 19 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:53,698 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 70.0) internal successors, (1330), 19 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:53,698 INFO L186 Difference]: Start difference. First operand has 252 places, 309 transitions, 5304 flow. Second operand 18 states and 1090 transitions. [2022-07-13 21:39:53,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 325 transitions, 4943 flow [2022-07-13 21:39:53,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 325 transitions, 4074 flow, removed 338 selfloop flow, removed 22 redundant places. [2022-07-13 21:39:53,916 INFO L242 Difference]: Finished difference. Result has 241 places, 126 transitions, 1033 flow [2022-07-13 21:39:53,917 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3878, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1033, PETRI_PLACES=241, PETRI_TRANSITIONS=126} [2022-07-13 21:39:53,917 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 171 predicate places. [2022-07-13 21:39:53,917 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 126 transitions, 1033 flow [2022-07-13 21:39:53,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 59.84615384615385) internal successors, (778), 13 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:53,918 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:53,918 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:53,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 21:39:54,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:54,123 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:54,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:54,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1656214660, now seen corresponding path program 7 times [2022-07-13 21:39:54,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:54,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127976021] [2022-07-13 21:39:54,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:54,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:54,202 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 54 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 21:39:54,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:54,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127976021] [2022-07-13 21:39:54,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127976021] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:39:54,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856440026] [2022-07-13 21:39:54,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 21:39:54,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:54,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:39:54,204 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:39:54,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 21:39:54,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:54,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 21:39:54,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:39:54,325 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 21:39:54,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:39:54,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856440026] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:54,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:39:54,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2022-07-13 21:39:54,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402865875] [2022-07-13 21:39:54,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:54,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 21:39:54,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:54,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 21:39:54,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-07-13 21:39:54,327 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 70 [2022-07-13 21:39:54,328 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 126 transitions, 1033 flow. Second operand has 13 states, 13 states have (on average 59.84615384615385) internal successors, (778), 13 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:54,328 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:54,328 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 70 [2022-07-13 21:39:54,328 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:54,604 INFO L129 PetriNetUnfolder]: 273/1534 cut-off events. [2022-07-13 21:39:54,604 INFO L130 PetriNetUnfolder]: For 17166/17226 co-relation queries the response was YES. [2022-07-13 21:39:54,616 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5369 conditions, 1534 events. 273/1534 cut-off events. For 17166/17226 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 13058 event pairs, 24 based on Foata normal form. 38/1481 useless extension candidates. Maximal degree in co-relation 5291. Up to 202 conditions per place. [2022-07-13 21:39:54,618 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 0 selfloop transitions, 0 changer transitions 140/140 dead transitions. [2022-07-13 21:39:54,618 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 140 transitions, 1017 flow [2022-07-13 21:39:54,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 21:39:54,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-13 21:39:54,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1074 transitions. [2022-07-13 21:39:54,620 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8523809523809524 [2022-07-13 21:39:54,620 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1074 transitions. [2022-07-13 21:39:54,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1074 transitions. [2022-07-13 21:39:54,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:54,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1074 transitions. [2022-07-13 21:39:54,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 59.666666666666664) internal successors, (1074), 18 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:54,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 70.0) internal successors, (1330), 19 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:54,623 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 70.0) internal successors, (1330), 19 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:54,623 INFO L186 Difference]: Start difference. First operand has 241 places, 126 transitions, 1033 flow. Second operand 18 states and 1074 transitions. [2022-07-13 21:39:54,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 140 transitions, 1017 flow [2022-07-13 21:39:54,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 140 transitions, 694 flow, removed 63 selfloop flow, removed 60 redundant places. [2022-07-13 21:39:54,642 INFO L242 Difference]: Finished difference. Result has 157 places, 0 transitions, 0 flow [2022-07-13 21:39:54,642 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=0, PETRI_PLACES=157, PETRI_TRANSITIONS=0} [2022-07-13 21:39:54,643 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 87 predicate places. [2022-07-13 21:39:54,643 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 0 transitions, 0 flow [2022-07-13 21:39:54,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 59.84615384615385) internal successors, (778), 13 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:54,645 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-07-13 21:39:54,645 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-07-13 21:39:54,645 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-07-13 21:39:54,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 21:39:54,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-13 21:39:54,862 INFO L356 BasicCegarLoop]: Path program histogram: [7, 3, 2, 1, 1, 1] [2022-07-13 21:39:54,864 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-07-13 21:39:54,864 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-13 21:39:54,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 09:39:54 BasicIcfg [2022-07-13 21:39:54,875 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-13 21:39:54,875 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-13 21:39:54,875 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-13 21:39:54,875 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-13 21:39:54,876 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:39:44" (3/4) ... [2022-07-13 21:39:54,877 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-13 21:39:54,881 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2022-07-13 21:39:54,882 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2022-07-13 21:39:54,884 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2022-07-13 21:39:54,885 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-07-13 21:39:54,885 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-13 21:39:54,885 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-13 21:39:54,911 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-13 21:39:54,912 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-13 21:39:54,912 INFO L158 Benchmark]: Toolchain (without parser) took 11546.97ms. Allocated memory was 113.2MB in the beginning and 358.6MB in the end (delta: 245.4MB). Free memory was 77.7MB in the beginning and 120.8MB in the end (delta: -43.2MB). Peak memory consumption was 201.5MB. Max. memory is 16.1GB. [2022-07-13 21:39:54,912 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 79.7MB. Free memory is still 36.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 21:39:54,912 INFO L158 Benchmark]: CACSL2BoogieTranslator took 314.11ms. Allocated memory is still 113.2MB. Free memory was 77.5MB in the beginning and 77.3MB in the end (delta: 194.3kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 21:39:54,913 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.57ms. Allocated memory is still 113.2MB. Free memory was 77.3MB in the beginning and 75.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 21:39:54,913 INFO L158 Benchmark]: Boogie Preprocessor took 38.42ms. Allocated memory is still 113.2MB. Free memory was 75.5MB in the beginning and 74.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 21:39:54,913 INFO L158 Benchmark]: RCFGBuilder took 243.46ms. Allocated memory is still 113.2MB. Free memory was 74.1MB in the beginning and 62.5MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-13 21:39:54,913 INFO L158 Benchmark]: TraceAbstraction took 10865.34ms. Allocated memory was 113.2MB in the beginning and 358.6MB in the end (delta: 245.4MB). Free memory was 62.2MB in the beginning and 122.7MB in the end (delta: -60.6MB). Peak memory consumption was 203.8MB. Max. memory is 16.1GB. [2022-07-13 21:39:54,914 INFO L158 Benchmark]: Witness Printer took 36.60ms. Allocated memory is still 358.6MB. Free memory was 122.7MB in the beginning and 120.8MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 21:39:54,915 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 79.7MB. Free memory is still 36.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 314.11ms. Allocated memory is still 113.2MB. Free memory was 77.5MB in the beginning and 77.3MB in the end (delta: 194.3kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.57ms. Allocated memory is still 113.2MB. Free memory was 77.3MB in the beginning and 75.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.42ms. Allocated memory is still 113.2MB. Free memory was 75.5MB in the beginning and 74.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 243.46ms. Allocated memory is still 113.2MB. Free memory was 74.1MB in the beginning and 62.5MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 10865.34ms. Allocated memory was 113.2MB in the beginning and 358.6MB in the end (delta: 245.4MB). Free memory was 62.2MB in the beginning and 122.7MB in the end (delta: -60.6MB). Peak memory consumption was 203.8MB. Max. memory is 16.1GB. * Witness Printer took 36.60ms. Allocated memory is still 358.6MB. Free memory was 122.7MB in the beginning and 120.8MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 10.7s, OverallIterations: 15, TraceHistogramMax: 6, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 5.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 487 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 487 mSDsluCounter, 224 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 320 mSDsCounter, 501 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1597 IncrementalHoareTripleChecker+Invalid, 2098 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 501 mSolverCounterUnsat, 72 mSDtfsCounter, 1597 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1265 GetRequests, 928 SyntacticMatches, 2 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2410 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5304occurred in iteration=13, InterpolantAutomatonStates: 272, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 1419 NumberOfCodeBlocks, 1414 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 1783 ConstructedInterpolants, 0 QuantifiedInterpolants, 6130 SizeOfPredicates, 62 NumberOfNonLiveVariables, 1376 ConjunctsInSsa, 96 ConjunctsInUnsatCore, 29 InterpolantComputations, 9 PerfectInterpolantSequences, 385/959 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-07-13 21:39:54,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE